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don't allow turning the backlight on if have_backlight == 0

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marschap
2008-03-08 18:23:07 +00:00
parent 6c8a0f26a2
commit e122d55965
1 changed files with 5 additions and 0 deletions
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server/drivers/hd44780.c
+5
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@@ -849,6 +849,11 @@ HD44780_backlight(Driver *drvthis, int on)
{ {
PrivateData *p = (PrivateData *) drvthis->private_data; PrivateData *p = (PrivateData *) drvthis->private_data;
// not sure if this is the correct solution.
// alternative: return immediately
if (!p->have_backlight)
on = 0;
if (p->hd44780_functions->backlight != NULL) if (p->hd44780_functions->backlight != NULL)
p->hd44780_functions->backlight(p, on); p->hd44780_functions->backlight(p, on);
} }